1. Anti-Sway Bars
  2. Roadmaster
  3. Anti-Sway Bar
  4. Rear
  5. 1-1/2 Inch Diameter
  6. Steel w Polyurethane Bushing
Roadmaster Rear Anti-Sway Bar

Roadmaster Rear Anti-Sway Bar

Item # RM-1139-117
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Retail:$570.05
Our Price: $444.52
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Anti-Sway Bars

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Roadmaster Anti-Sway Bar - RM-1139-117
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Minimize sway and driver fatigue by improving the stability and driveability of your vehicle. The bar on this sturdy, effective anti-sway system mounts to the rear axle and to the frame to balance weight transfer and reduce body roll. Call 800-298-8924 to order Roadmaster anti-sway bars part number RM-1139-117 or order online at etrailer.com. Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Roadmaster Rear Anti-Sway Bar. Anti-Sway Bars reviews from real customers.
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Roadmaster Anti-Sway Bars - RM-1139-117

  • Roadmaster
  • Anti-Sway Bar
  • Rear
  • 1-1/2 Inch Diameter
  • Steel w Polyurethane Bushing

Minimize sway and driver fatigue by improving the stability and driveability of your vehicle. The bar on this sturdy, effective anti-sway system mounts to the rear axle and to the frame to balance weight transfer and reduce body roll.


Features:

  • Minimizes side-to-side movement to improve overall stability of your vehicle
    • Lets you execute turns and quick maneuvers with confidence
    • Allows for a level ride, even on irregular surfaces
    • Reduces driver fatigue - minimizes effort required to keep your vehicle in line
  • Diminishes effects of crosswinds, passing motorists and shifting cargo
  • Designed to fit your vehicle and work in conjunction with its suspension system
    • Attaches to rear axle and to chassis - uses weight of axle to brace frame as it shifts in turns
    • Engineered to avoid interference with most popular aftermarket add-ons and accessories
  • Made with polyurethane bushings instead of the standard rubber variety for a longer-lasting system
    • Polyurethane is durable and resistant to damage caused by oil, gasoline and ozone
    • Less wear means less give in the system and better support
  • Constructed of thick 4140 chromoly steel for superior strength
  • Includes heavy-gauge mounting hardware, easy-to-follow instructions and bushing lubricant
  • Works with front anti-sway bar (sold separately) for absolute stability - available on certain applications only
  • Made in the USA


Specs:

  • Bar diameter: 1-1/2"
  • Limited Lifetime Warranty


Roadmaster Anti-Sway Bar Installed

Benefits of an Anti-Sway System

The Roadmaster anti-sway bar does for side-to-side movement what a good pair of shocks does for up-and-down motion. You will notice a marked improvement in your vehicle's stability as the bar works to balance weight transfer and reduce body roll. The anti-sway bar acts as a link between your vehicle's frame and its rear axle, using the axle as a brace to more effectively balance the shifting weight of your vehicle as you maneuver it. Lubricated bushings allow just enough pivot and rotation to compensate for the pressure placed on one side of your vehicle when it goes into sudden maneuvers, hits crosswinds or encounters shifting weights.


Roadmaster Anti-Sway Polyurethane Bushings

Superior Construction

The Roadmaster anti-sway bar is made of 4140 chromoly, a chromium and molybdenum steel alloy. This type of steel is considerably harder and stronger than the standard 1020 steel that is typically used in anti-sway applications. In addition, the larger diameter of the bar increases its torsional roll stiffness. The result is a bar that is not only stronger than the competition, but also nearly 30 percent better at resisting sway. The polyurethane bushings and grommets used at the attachment points are durable yet flexible, ensuring that the system is neither so rigid nor so malleable that it becomes ineffective.



1139-117 Road Master Anti-Sway Bar - Rear

Installation Details RM-1139-117 Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Roadmaster Rear Anti-Sway Bar - RM-1139-117

Average Customer Rating:  4.8 out of 5 stars   (567 Customer Reviews)

Minimize sway and driver fatigue by improving the stability and driveability of your vehicle. The bar on this sturdy, effective anti-sway system mounts to the rear axle and to the frame to balance weight transfer and reduce body roll.

- RM-1139-117
by: 09/11/2020

Improved the performance of my motorhome , 877553



- RM-1139-117
by:

We purchased item no. RM-1139-117 for our 1986 class c rv. It made a world of difference in the way it handles. Our son who is a mechanic at Peterbilt Manitoba did the install. 819177



- RM-1139-117
by:

My 89 E-350 didn't have any sway bar one the rear, I didn,t know if it would be worth the investment or not.. The unit drives so much better, it's great.. 797082



- RM-1139-117
by:

Great service and fast delivery. Installed on our 2017 Class C RV and made a world of difference on our cross country trip. Hardly notice any sway at all when driving or passing trucks, not even during strong wind gusts. Had it professionally installed by a local mechanic. Highly recommended doing the upgrade. May be overkill but this was done along with the front sway bar, upgraded steering stabilizer and sumo springs at all 4 wheels. Important for my peace of mind doing some long distance highway driving. 787404



- RM-1139-117
by:

Should be a factory installed part. It made my camper go down the road a lot better. 736490



- RM-1139-117
by:

Best thing I ever did for my E350. 721755



- RM-1139-117
by:

Big difference excellent quality and easy install. Did job right on ground in driveway. Really drives nice and solid now recover on bumps are recovered in one bounce instead of 5 to 6 bounces . I did front and back .Also added the rescue roadmaster reflex steering stabilizer what a difference . Install on 2018 winnabego Minnie Winnie . 661979



- RM-1139-117
by:

I love etrailer sales representatives and products. I have an RV and have equipped my vehicles with trailer hitches for various purposes. etrailer staff and representatives are always helpful. Additionally one big feature I see on etrailer site is their installation videos and video product reviews. These are extremely helpful to me since I do may own installations. One minor comment. When you do your videos include both sides of the vehicle especially if one side is more difficult then the other. I realize some times you video the easy side because of camera set up. Even so you installation videos are definite a great help. 640880



- RM-1139-117
by:
2018 Thor Chateau Motorhome

This rear anti-sway bar was installed in the 2018 E350 Thor Chateau U23 without any issue and without the need to drill the hole for upper vertical-run link. Have not done the test drive run yet to see the effect. 638140



- RM-1139-117
by:
Winnebago

Very fast delivery. This product was put on a 2018 Winnebago R V E350. I put front and rear on, made a big difference in driving and handling. 636837



- RM-1139-117
by:
2018 Winnebago Minnie Winnie Motorhome

Easy to install, fast shipping 583655



- RM-1139-117
by:
2016 Ford E-Series Cutaway

Great to deal with! 515630



- RM-1139-117
by:

Installed this on my '96 Coachmen class C. The installation was straightforward; because I was replacing an OEM sway bar, some of the included brackets were not required. The only challenge with the installation was the weight of this bar - so it would be an easier install job if you have a helper. The RV drives well and with less body sway - which is what I was looking for. 461104



- RM-1139-176
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I would like thank Crystal at etrailer for expediting my order. She verified i had the right part number, verfied it was in stock, and personally expedited the shipping. 2 days later the part was in hand at the rv park we were staying at and 1 hr later i had the part installed. Thank you again Crystal for all your help and i will be order from you folks again. 334111



- RM-1209-131
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Installed on MB Sprinter 3500 RV. Corrected sway and yaw when being passed by big rigs. Install directions were confusing. Called Roadmaster, they sent better instructions and talked with installer and solved the issue. 643712



- RM-1139-149
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


GOOD PRODUCT 498565



- RM-1139-140
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Good anti-sway bar. Installation was made difficult by being unable to easily remove the OEM anti-sway bar. Although this item was intended to go on a near-new 2015 motorhome, the original retaining bolts were very difficult to remove. However, installation of the RM 1139-140 was relatively easy and completed in about an hour by one person. If two people did the task, it could be done in half that time. The only disappointment, and it was significant, is that there was no mention of torque values for the mounting bolts. 223089


Comments
After a year of use over about 8,000 miles, I have to say the improvement they made are moderate at best even considering I put them on the front and back.
Vince L - 08/30/2016

20677

- RM-1139-140
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Great customer service from purchase to delivery. Kept informed all the way by George with fast shipping. Sway bar was quick and easy to install on my 2018 Windsport, about 1 1/2 hours by myself. Considerably heavier than original, helps reduce sway as advertised. Great experience with company would purchase other items in future. 483047


Comments
Sway bars are still working great. Would not have another RV without them.
Thomas - 03/09/2019

50330

- RM-1139-140
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Combined with rear sway bar drives just as I had hoped 312489



- RM-1139-140
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I received my order, but all the parts wasn't with it. All I got was the bar and the two bushing and brackets that mounts the bushing to the frame. All this came in one long box. According to the picture there are suppose to be more parts. I thought this is an expensive part for no more than I got with it. $ 600.00 for a bar really!! 211264



- RM-1209-131
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I put this on my 2015 Winnebago view. I left the stock swaybar and added this one to the front of the rear axle. It was the single biggest improvement that I did to the suspension. I can't believe Winnebago sells the RV without this upgrade. It improves handling in the wind or turning corners tremendously. 258934



- RM-1139-176
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Let start with Mark S. Sale Rep Good Job Very Helpful Courteous and very informed. Very prompt on returning my calls. Thanks Mark S. you define what is the Excellent in Customer Service Wow same Day Shipping every time that evening your order will be at UPS heading your way. Got the Sway bar installed Instruction clear and precise. Made a huge differences in way motor home handle . I have not installed the back sway bar motor home. This upgrade very well worth the money. Dont think no more about this upgrade; just order and install . you wont regret it. 508616



- RM-1209-131
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I just installed the roadmasteranti sway bar 1209-131 on my 2013 Winnebago via.The vehicle is a 2012. it fit well and road test good. I had to shorten the exhaust about 9 inches because it interfered with drivers side arm other than that its good to go. 108043


Comments
I am thinking about adding the 1209-131 to my 2011 Winnebago Via 25Q. Which model Via do you have? Im hoping I wont have to modify the exhaust on my Via Q. Thanks.
-- comment by: Jim - 02/17/2014

2844
Comments
I put the sway bar on a 2012 25t I did shorten the exhaust about 9 inches I think 2 or 3 inches would have been good. That was easy to do, as new as they are just take exhaust loose at first coupling pass the elbow slide it out and take some off the piece that goes to the inside. Worked well for me. Going from our drive onto the blacktop road in front of our place was all it tuck to decide it was worth the effort. It fit very well. Thanks Mack. PS I am 75 and 240 Made a man door step for drivers door .It works well Love it. Mack
-- comment by: Mack - 02/19/2014

2869

Thanks for following up with us!

-- Patrick B - 2/19/2014

Comments
Mack, Patrick,Thank you!
-- comment by: Jim - 02/20/2014

2878
Comments
Still working very good I am not sure I needed to shorten exhaust but I did not know how much movement would be in the down rod So I did it just in case, working very good Mack
Mack - 11/21/2014

7779

- RM-1139-146
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


Arrived on time and is now installed. Made all the difference in the world. No more white knuckles. Don't even think twice about this upgrade! Just do it !!! Also installed the Roadmaster RSSA........ 604984



- RM-1129-111
by:

Review from a similar Sway Bar with Bushing Kit in Anti-Sway Bars


I have a 2000 dodge van 3500. Roadtrek versatile. The installation of Sway bar 1129-111 was somewhat easy. Except for connection to the Fram rails. Vinyl cover on driver side fram rail and propane lines next to rail on both sides. It would make installation Easter to remove rear tires and support vehicle on Jack stands on level ground. After driving for several miles the sway bar performed well. Would recommend rear sway bar to help stabilize your vehicle. Thank you 386045


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Show More Reviews

Ask the Experts about this Roadmaster Anti-Sway Bars

  • Sway Bar Recommendations for 2017 Nexus Viper 25V Built on Ford E-350 Chassis
    For motorhomes like your 2017 Nexus Viper 25V class B motorhome that’s built on the Ford E350 chassis the biggest improvement you'll make to reduce sway is with a rear sway bar. For that the correct part number is the part # RM-1139-117 and the next biggest improvement you'll make is with a front sway bar like the part # RM-1139-176 so the two part numbers you mentioned are correct. So if you have to pick one for right now definitely go with the rear bar first and from there if you...
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  • Why are There Two 1-1/2 inch Diameter Roadmaster Sway Bars for 2017 Ford E-350 Cutaway
    The reason there are two 1-1/2 inch diameter Roadmaster sway bars that fit your 2017 Ford E-350 is that the # RM-1139-198 is for versions of the vehicle that have automatic snow chains that deploy and the part # RM-1139-117 is for the versions that do not have the chains. So based on whether you have the snow chains is how you'd pick which set to go with!
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  • Recommended Rear Anti-Sway Bar for 2011 Ford E-350 Super Duty Van
    The Roadmaster Rear Anti-Sway Bar for Motorhomes # RM-1139-117 is the correct fit for your 2011 Ford E-350 Van whether you have the V10 or the V8 engine. This anti-sway bar is 1-1/2 inches diameter and has polyurethane bushings. It attaches to your rear axle and to the chassis to brace the frame as it shifts allowing a more level ride and the ability to make turns with greater stability. I've attached a video to further assist.
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  • Sway Bars for Improved Ride Quality for 1994 Fleetwood Montara 27 Tioga Ford 460 E-350 Dually
    The biggest ride quality improvement you can make with an RV is with a rear sway bar, followed by doing a front sway bar and then a steering stabilizer and axle stabilizer. The part # RM-1139-117 for the rear bar will work great and will make the biggest improvement. The front sway bar part # RM-1139-115 is also a fit and will work well.
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  • Sway Bars and Steering Stabilizer for a 2003 Pleasure Way Excel TS Class B on Ford E-350 Chassis
    Since your 2003 Pleasure Way Excel TS is a Class B motorhome built on a 2002 Ford E-350 chassis the correct rear sway bar would be the part # 1139-178. Then for a front sway bar part # RM-1139-115.
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  • Recommended Rear Sway Bar for 2017 Thor Four Winds 24F
    For your 2017 Ford e-350 chassis with V-10, I recommend you use the Roadmaster Rear Anti-Sway Bar for Motorhomes # RM-1139-117 for your application. This is an easy installation with just simple hand tools. There is no drilling required for this application. I've attached a product review to assist. I've attached the installation instructions, and you can see by their note to set the parking brake and chock the wheels that they have intended for this installation to be done on the...
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  • Which Roadmaster Anti-Sway Bar to Upgrade OEM Unit on 2012 Ford F-350 Dually
    The anti-sway bar you referenced, part # RM-1139-117 from Roadmaster, is intended for use on motor homes, but we do have two anti-sway products for the 2012 Ford F350. Their fit will depend on the version of the F-350 you have. For the F-350 pickup we offer a sway bar to replace the factory unit. This item is part # RM-1139-173. This requires the factory end links from the OEM sway bar for installation. If your F-350 does not have a factory sway bar you will need to purchase the end...
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  • Recommendations for Reducing Rear Sway on a 2008 E350 Van Motorhome
    The Roadmaster Rear Anti-Sway Bar part # RM-1139-117 that you referenced is confirmed to fit your 2008 Ford Camper Van and would minimize sway and driver fatigue by improving the stability and driveability of your vehicle. You might also check to make sure you shocks are in good condition and that your wheels have a good alignment.
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  • Sway Bar Recommendation for 24 Foot 1996 Fleetwood Jamboree
    Yes, for your Fleetwood Jamboree built on a Ford E-350 chassis we have the Roadmaster steering stabilizer part # RM-1139-117 as a confirmed fit for the rear bar and then part # RM-1139-115 for the front.
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  • Rear Sway Bar Recommendation for a 2002 B250 Van RV
    Yes, we offer a rear sway bar that is confirmed to fit your 2002 Dodge B250 Van. You would want the Roadmaster Sway Bar part # RM-1129-111. I confirmed with Roadmaster that this would be the correct kit for you.
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  • Front and Rear Anti Sway Bars for 1997 Class C Motorhome on Ford E-350 Chassis
    The Roadmaster anti-sway bar that fits the rear of your 1997 Born free motorhome is part # RM-1139-117. Then for the front use part # RM-1139-115. Both are designed specifially for Class C motorhomes on the Ford E-350 chassis.
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  • How To Help Control Sway On a 2017 Thor Motorhome 22FE
    The SumoSprings Custom Helper Springs that I recommend for your 2017 Thor Motorhome 22FE is part # SSF-106-47 for the front and part # SSR-106-47-1 for the rear. The SumoSprings Custom Helper Springs will absolutely help with sway as well as porpoising. There is also another option for you to help control sway as well, the Roadmaster Rear Anti-Sway Bar part # RM-1139-117. These are the two most common upgrades on a motorhome to help with sway and other stability issues. In regards to...
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  • Correct Reflex Steering Stabilizer for a 2018 Thor Freedom Elite 26HE Motorhome
    The Roadmaster Reflex Steering Stabilizer with Mounting Brackets for Class C Motor Homes # RM-RBK2-RSSC comes with a bracket that is specific for the 2017 Ford E-350 with the V8. For your V10 you need the Roadmaster Reflex Steering Stabilizer with Mounting Brackets for Class C Motor Homes # RM-RBK24-RSSC which has a different bracket for your application. If you are looking to improve the ride quality of your 2018 Thor Freedom Elite 26HE then I also recommend installing sway bars. Part...
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  • Should Front or Rear SumoSprings be Added to 2015 Thor Motor Coach First
    When improving the ride for your 2015 Thor Motor Coach 24C on a Ford E-350 chassis the best thing to do would be to install all of them. The SumoSprings replace factory bump stops and the sway bar replaces your factory sway bar. If you had to choose just one I recommend installing the rear SumoSprings # SSR-130-54 as they will help with both the sway and the jounce as opposed to just sway with the sway bar. Next I would install the front SumoSprings # SSF-106-47 as it will help with...
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  • Replacement Front and Rear Sway Bars for 2015 Thor Axis 25.1
    The Roadmaster Front Sway Bar # RM-1139-176 you were looking at is the correct front sway bar for your 2015 Thor Axis Class A and you'll want to use the Roadmaster # RM-1139-117 for the rear sway bar. If you also need to replace the front end links you can use the Replacement Front End Link kit # RO57FR. These parts will help work to stiffen up the suspension system on your coach and create a much smoother ride.
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  • Suspension Enhancement for Motorhome on 1989 Ford E-350 Chassis
    The Air Lift LoadLifter 5000 Ultimate Air Helper Springs # AL88138 is indeed the correct kit for your 1989 Ford E-350 chassis. The air springs will certainly help to level out the rear of the RV and stabilize the suspension for reduced sway but it's important to keep in mind that this and all other similar kits are designed to work with suspension systems that are in good working order. This simply means that while the springs will provide benefit you likely won't get the chassis up to...
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  • What is Difference Between Two Roadmaster Sway Bars that Fit 2012 Ford E-350
    Since there are several different variations of vans similar to your 2012 Ford E-350 there were several different styles of sway bars made to cover all of them. In this process there is some overlap which is why for your vehicle the part # RM-1139-117 and # RM-1139-198 both are a fit. They both are 1-1/2 inch diameter sway bars so they both will perform as good as the other.
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  • Anti-Sway Bars and Axle Stabilizers for a 2008 Pleasure-way Excell TS
    If your 2008 Pleasure-Way Excel is built on the Ford E-350 van chassis then for a rear anti-sway bar you can use # RM-1139-117. If it is built on the E-450 van chassis use # RM-1139-147. For the front you can use # RM-1139-115 which will fit E-250 through E-450 chassis. I have included a link to our help article on heavy duty vehicle stability for you.
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  • Helper Springs, Steering Stabilizer, and Anti-Sway Bars for RV Built on 2013 Ford F-350 V10 Chassis
    To start I actually recommend Timbren rear helper springs # TFER35092B because they were specifically designed for RVs built on the 2013 Ford E-350 van chassis, have a lifetime warranty, and cost less than the SumoSpring options. They are rated at 3,600 pounds. For a steering stabilizer use the Roadmaster Reflex steering stabilizer # RM-RBK24-RSSC. For a front anti-sway bar you can use # RM-1139-176 which will replace the factory sway bar. And for the rear you can use # RM-1139-117....
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  • Steering Stabilizer for a Class C RV Built on a 2014 Ford E-350 Van Chassis
    Roadmaster steering stabilizer # RM-RBK11-RSSC is designed for Class C RVs built on the 2014 Ford E-350 van chassis and that have the V10 engine. If your model had the V8 motor and does not have the OEM dampener then the correct steering stabilizer is # RM-RBK2-RSSC like you said. But if it has the dampener then there other ways to add stability to the RV. For example you can upgrade the front factory sway bar using # RM-1139-176 and the rear using # RM-1139-117. This will make the...
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  • Sway Bar for 2006 Pleasure Way Excel TS
    The correct rear anti-sway bar for your 2006 Pleasure Way Excel TS, which was built on a Ford E-350 chassis, is indeed the Roadmaster Rear Anti-Sway Bar # RM-1139-117. For a front anti-sway bar you need part # RM-1139-115; the correct steering stabilizer is part # RM-RBK24-RSSC.
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  • Front and Rear Sway Bar and Steering Stabilizer Recommendation 2016 Ford E-350 Motorhome
    For a front sway bar you would want the part # RM-1139-176, for a rear bar you would want the # RM-1139-117. Then for a steering stabilizer you would want the part # RM-RBK24-RSSC. I confirmed with Roadmaster that all of these would fit your 2016 Ford E-350 Motorhome.
    view full answer...
  • Recommended Rear Anti-Sway Bar for 2014 Thor Axis RV
    Based on my research, your 2014 Thor Axis 24.1 RV is built on the Ford E-450 chassis with the V10 engine. I do recommend confirming this with your paperwork. If this is correct, I recommend the Roadmaster Rear Anti-Sway Bar # RM-1139-147. This is confirmed to fit this chassis and it will do a great job of minimizing sway and driver fatigue by improving stability and drivability of the RV. It will mount to the rear axle and frame with the included hardware. For a front sway bar you can...
    view full answer...
  • Sway Bar Recommendation for a 2004 Ford E350 Cutaway
    Roadmaster offers an anti-sway bar that is confirmed to fit your 2004 Ford E350 cutaway box van. You would want the Roadmaster Sway Bar part # RM-1139-117. If you wanted a front sway bar you would want the Roadmaster Front Anti-Sway Bar # RM-1139-115. I attached links to installation instructions for both products.
    view full answer...
  • Anti-Sway Bars and Steering Stabilizer for 1997 Ford E-350 Class C Motorhome
    We do have the anti-sway bars, steering stabilizer, and helper springs that will giver your Class C motorhome on a 1997 Ford E-350 chassis a much better ride. To best improve your ride you will want the rear anti-sway bar, followed by the front anti-sway bar, and steering stabilizer. These will give you the greatest improvements with the most comfort to your motorhome. I confirmed with the manufacturer the following fits, and the rear anti-sway bars are going to depend on if you have...
    view full answer...
  • Rear Sway Bar for 2004 Pleasureway Excel-TS Class B Motorhome
    According to my Roadmaster representative, the correct rear sway bar for your 2004 Pleasureway Excel-TS would be part # RM-1139-117. The # 1139-178 you mentioned has been discontinued and is no longer available.
    view full answer...

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Info for this part was:

Written by:
Lindsey S
Installed by:
Jeff D
Installed by:
David F
Expert Research:
Jameson C
Expert Research:
Adam R
Video Edited:
Jacob T
Video Edited:
Dustin K
Updated by:
Shelly K
Updated by:
Sarah W
Updated by:
Isabelle B

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